Crosswalk data and readme: https://www.ddorn.net/data.htm
data_year.dta files are from IPUMS website

initial processing: initial_processing.do. This file analyzes data downloaded from IPUMS website and create a few preliminary files
final processing: final_processing.do. This calls initial_processing.do (or analyzes files produced by initial_processing.do), creates many TEMP files and runs regressions 
	In particular, final_processing.do produces Tables 3, 10, 11, 12 (see comments in the file for details)